"Pretty Little Liars" There's No Place Like Homecoming ... - IMDb
Hanna steals Toby’s psychiatric file, which reveals that Alison was blackmailing him. The girls discover Toby was in a romantic relationship with his stepsister, Jenna , and Alison used this secret to force him to take the blame for "The Jenna Thing". [S1E6] There's No Place Like Homecoming
Believing Toby is Alison's killer, the girls text Emily a warning while she is alone with him in the chemistry lab. Panicked, Emily injures Toby and flees, knocking herself unconscious in the process. "Pretty Little Liars" There's No Place Like Homecoming